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JJO BUTLER.

v NUT LOGK. I No. 356,745. Patented Feb. 1,1887.)

ATTORNEYS- W 7 f .2 z k WITNESS I lhvrrnn Srnrns JEREMIAH O. BUTLER, OFLEXINGTON, MISSOURI.

NUT-LOCK.

SPECIFICATION" forming part of Letters Patent No. 356,7d5, datedFebruary 1, 1887.

I Application filed May 20, 1886. Serial No. 202,827. (No model.)

To all 1.0720722 it 72mg concern.-

Be it known that I, JEREMIAH G. BUTLER, of Lexington, in the county ofLafayette and State of Missouri, have invented a new and usefulImprovement in Nut-Looks, of which the following is a specification,

This invention is an improvement in that class of nut-locks in which thebolt is formed with a keyway, and a key extends through the top hole ofthe nut and rests in said heyway, and is bent to engage the nut and solock it from turning.

The invention consists in the novel construction of the key, whereby itmay be drawn off the bolt by the nut, and need not be bent out straightinto the keyway of the bolt to prevent its locking portion engaging inthe recesses of the nut as the latter is being turned off the bolt. V

In the drawings, Figure l is a perspective view of my nut-lock as inuse. Fig. 2 is a longitudinal section thereof drawn alongside of the keyand showing the latter unlocked in full and locked in dotted lines. Fig.3 is a face view of the nut-lock. 4 shows the lceyin unlocked positionin full lines, and bent, as when locked, in dotted lines.

The bolt A is formed with a lceyway or seat, a. The nut Bis provided inits rear face with a recess, b, fitted to receive the projection on therear end of the key, and while it is preferred to employ such recess, itmay be omitted without departing from the broad principles of lheinvention. On its outer face or end the nut is formed with corrugations,forming alternate recesses l and projections 2. These projections do notextend to the top hole of the nut, but terminate short thereof, leavinga groove or way, 3, surrounding the outer end of said top hole.

The key 0 is formed to fit in the seat a, and has at its inner end aprojection, 4, which extends against the rear face of the nut and rests,preferably, in the recess b, as shown. Near its opposite end the key isformed with a projection or shoulder, 5, which bears against thefrontedge of the nut and in the way 3 thereof, as shown. The keyisextended at 6 in advance of the projection 5, and such extension. isadapted to be bent to engage the nut, and usually into the proper one ofrecesses 1 between projections 2, as indicated in dotted lines, Fig. 2,to lock the out from turning. lhe projection 5 prevents the key frombeing forced rearwardly through the nut, as will be seen.

The following is an important advantage resulting from the formation ofthe key with projection 5. When the nut is locked, to unlock the same itis only necessary to bend the extension 6 out of the recess 1 to theposition shown in full lines, Fig. 2, when the nut may be turned off thebolt and the key will be drawn off the bolt with the nut. Now, it willbe seen that the shoulder 5, being engaged by the nut,holds the key insuch position with reference to the nutthat the extension 6, when bentas shown, will not be caught in the recesses or notches 2 as the nut isturned off. If the key were formed without this shoulder 5 the not couldnot be easily removed,unless the key were bent out straight and downinto the heyway of the bolt, as otherwise the lockingextension of thekey would be engaged from time to time by the nut and have to bereleased, rendering the operation troublesome. Such bending of the heyis objectionable, as it frequently breaks, and in all cases strains thekey, and after it has been bent once or twice to the necessary extent itbecomes broken or otherwise unfit for the desired purpose. In myconstruction, it will be seen, the key needs only to be bent veryslightly for its adjustment into locked or unlocked position, andtherefore will not only be easier of adjustment off the bolt, but willhe more durable, as Well as more convenient in use.

Having thus described my invention, what I claim as new is- 1. In anut-lock, a key having a projection or shoulder at one end and providedwith a projection or shoulder near its other end, and having anextension beyond the latter shoulder or projection, substantially as setforth.

2. The combination of the bolt having a keyvvay, the nut, and the keyhaving projections 4 and 5 and provided with an extension, 6, in advanceof the projection 5, said extension being adapted to be bent to engagethe-nut, substantially as set forth.

JEREMIAH C. BUTLER.

Witnesses:

ETHAN ALLEN, ALEX. A. LESULUR.

